Thread: .300 Blackout help

Originally Posted by LJP

Out of interest what it the over all length with your 151gr HP projectile loaded? Trying to figure out if I can crimp on the cannelure & still fit in my short magazine. Another random question do your cast 151gr HP shoot better a specific distance of the lands?

Just use the crimp groove the bullet is designed for a standard .308 throat the 300BLk is the same, Cast bullet don't like being jambe into the lands
just a light touch I find it easier to crimp in the groove they don't mind a jump
They will fit your magazine My blackout is built on a .222 and mag length is 2.130" no problem with 147 gr FMJ's crimped in the cannelure .223 OAL is 2.260".